This Music Wallpaper app has a great free music-related images such as guitars, headphones, cassette tapes, etc. 

What's great about this android app is that it is very easy to navigate and the best thing is that it doesn't cost anything. You will be able to use this application for free. 

The images will be available in HD and FHD quality, and you will be able to set it as the home wallpaper or lock screen of your device. We have also added an option of adding your own background image or photo as well.